Liquid coating composition.



Examiner UNITED STATES PATENT OFFICE.

JAMES CARREL DOBBINS, OF PORTLAND, OREGON.

LIQUID COATING COMPOSITION.

No Drawing.

7 o// whom it may concern:

Be it known that I, Janus C. Donnixs. a citizen of the United States of America. residing at Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Improvement in Liquid Coating Compositions. of which the following is a specification.

My present invention relates to an improved liquid coating composition or sizing adapted for use on fabrics. walls. etc.. for filling. stiffening and giving a finished appearance to plaster, cement, clay or other mineral surfaced walls.

The primary object of the invention is the provision of a coating or composition for this purpose. which is water proof. and may be applied to a wall with facility and despatch and is then ready and in prime condition to be stippled in order to give to the wall or surface the appea ance of sand paper. or other analogous material.

The invention consists essentially in mixing certain ingredients into a paste formation or condition. which may he applied to a wall with a brush or broom, and then stippled before drying.

In the following specification I have illustrated one example of the physical embodiment of my invention mixed according to the best mode I have so far devised for the practical application of the principles of my invention.

In carrying out the process to produce my improved composition I utilize various powdered ingredients which. after being mixed together. are then mixed with a liquid ingredient.

The powdered ingredients have for their base pure ordinary Portland cement or white cement. to which is added hydrated lime, plaster of Paris. ground mica, and a mineral color to give the desired shade. the mineral color being ground mortar as procurable on the market.

I find that the following formula for the powdered ingredients is satisfactory and gives good results lQO pounds pure Portland cement Specification of Letters Patent.

Application filed January 10, 1917.

'20 pounds hydrated li 1 pound plaster Pfiisz 30 poun s round mortar. of desired atented May 15, 1917.

Serial No. 141,579.

it pound ground mica.

These ingredients in their proper proportions are placed in a vessel and thoroughly mixed or commingled into a homogeneous powder which is mixed with the following liquid formula in order to form a paste.

The liquid formula contains 4 gallons ofllifli- 1 fluid ounce household a o l fluid ounce tinctur of asgfgtida.

The water, ammonia. and tincture of asafetida are poured into a vessel and thoroughly mixed. and then the mixture is poured into the mixture of powdered ingredients contained in a vessel. As the liquid formula is poured into the powdered ingredients the entire mass is stirred continuously. until the entire quantity has been mixed to the consistency of paste when it. is ready for application to the wall, canvas. or other surface that is to be sized.

In applying the paste to a g gglt plaster. clay or other mineral surface. it is preferred to use a broom or brush. such as for instance a whisk-broom. The whisk broom may be dipped into a bucket of the paste and then slapped broadside against the surfaces to be sized and this slapping process is repeated until approximately four or five square feet of surface have been covered with the sizing paste while it is in rather more than a plastic condition. The surface which has thus been coated is now stippled or hammered with the brush, using preferably a brush of the nature of the ordinary scrubbing brush. and applying the ends of the bristles to the paste that has been laid on the surface. The effect of this stippling is to produce a uniform. but rough finish or sizing on the surface being coated. the appearance of the wall being somewhat similar to that of sand paper, or a smooth troweled surface may be effected Where desired, and in some instances the effect of artificial marble may be produced, and it will be found that the sizing is waterproof so that it may be washed when required, and presents a plain but ornamental and pleasing effect to the eye.

I claim the following:

A sizing composition in the nature of a paste comprising approximately 100 lbs. Portland cement, 20 lbs. hydrated lime, 1 lb.

water to give the composition a pasty consistency.

In testimony whereof I aflix my signature.

JAMES GAR-REL DOBBINS.

Copies of this patent may be obtalned for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

